Download Primary and Secondary Unit Substations

Low Voltage Switchgear
Primary and Secondary Unit Substations
MVS Primary Switch and Low Voltage Metal-Enclosed Switchgear
17.2
Contents
Description
Page
Primary and Secondary Unit Substations
Standards and Certifications . . . . . . . . . . . . . . . . . . . . . . 108
Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Technical Data and Specifications . . . . . . . . . . . . . . . . . . 108
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Product Description
Application Description
Unit Substations
Most switchgear assemblies
are configured as unit
substations.
A unit substation, as referred
to in this publication, is
defined as a coordinated
assembly consisting of
three-phase transformers
with high-voltage incoming
line sections and an assembly
of low voltage distribution
sections.
Liquid-Filled Transformers
●
Mineral oil
●
FR3
●
BIOTEMP®
●
Silicon
Dry-Type Transformers
●
VPI
●
VPE
●
RESIBLOC®
●
Cast coil
Secondary Unit Substations
●
Liquid-filled or dry-type
transformer
●
Transformer kVA 112.5
through 3750
●
Low voltage—208, 240,
480 or 600V
Primary Unit Substations
Liquid-filled or dry-type
transformer
●
Transformer kVA 500
through 20 MVA
●
Low voltage—2400V
through 24.5 kV
Eaton’s unit substations
follow the system concept
of locating transformers as
close as practicable to areas
of load concentration at usage
voltages, thus minimizing
the lengths of secondary
distribution cables and buses.
This concept provides several
basic advantages, such as:
●
●
●
●
●
Unit substations may be
indoor or outdoor, with a
selection of high voltage
incoming sections, a choice
of transformer types and an
arrangement of switchgear to
suit the application.
●
●
●
●
Reduced power losses
Improved voltage
regulation
Improved service
continuity
Reduced likelihood of
faults
Increased flexibility
Minimized installation
expense
Elimination of the need for
vaults due to availability of
non-flammable types of
transformers
Efficient space utilization
Advantages of Unit Substations
●
Complete coordination,
both mechanical and
electrical
●
Extreme flexibility with wide
choice of components and
ratings to meet exact
application requirements
●
Optimum safety to
operators
●
Modern design
●
Meets all applicable ANSI,
IEEE®, NEMA and UL
standards
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Features, Benefits
and Functions
Refer to TD.49A.01.T.E for
primary unit substations and
TD.49A.02.T.E for secondary
unit substations.
Options
Refer to TD.49A.01.T.E for
primary unit substations and
TD.49A.02.T.E for secondary
unit substations.
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Volume 3—Power Distribution and Control Assemblies CA08100004E—December 2010 www.eaton.com
For Immediate Delivery or Tech Support call KMParts.com at (866) 595-9616
107
17.2
Low Voltage Switchgear
Primary and Secondary Unit Substations
17
Standards and
Certifications
17
Refer to TD.49A.01.T.E for
primary unit substations and
TD.49A.02.T.E for secondary
unit substations.
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Product Selection
Contact Eaton for details
and part numbers for
CSA-approved units.
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Unit substations are
engineered to order and
have multiple configurations.
Contact Eaton for
configurations, pricing
and availability.
Technical Data
and Specifications
Refer to TD.49A.01.T.E for
primary unit substations and
TD.49A.02.T.E for secondary
unit substations.
Product Specifications
Refer to Section 16312 of the
Product Specification Guide
for primary unit substations
and Section 16311 of
the Product Specification
Guide for secondary unit
substations.
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Volume 3—Power Distribution and Control Assemblies CA08100004E—December 2010 www.eaton.com
For Immediate Delivery or Tech Support call KMParts.com at (866) 595-9616
Index
A
Advantages, 1
advantages, 1
all, 1
an, 1
and, 1-2
ANSI, 1
applicable, 1
Application, 1
application, 1
approved, 2
are, 1-2
areas, 1
arrangement, 1
as, 1
Assemblies, 1-2
assemblies, 1
assembly, 1
at, 1-2
availability, 1-2
B
basic, 1
be, 1
Benefits, 1
BIOTEMP, 1
both, 1
buses, 1
C
CA, 1-2
cables, 1
call, 1-2
Cast, 1
Certifications, 1-2
choice, 1
close, 1
coil, 1
com, 1-2
Complete, 1
components, 1
concentration, 1
concept, 1
configurations, 2
configured, 1
consisting, 1
Contact, 2
Contents, 1
continuity, 1
Control, 1-2
coordinated, 1
coordination, 1
CSA, 2
Index
D
G
Data, 1-2
December, 1-2
defined, 1
Delivery, 1-2
Description, 1
design, 1
details, 2
Distribution, 1-2
distribution, 1
Dry, 1
dry, 1
due, 1
Guide, 2
E
Eaton, 1-2
eaton, 1-2
Efficient, 1
electrical, 1
Elimination, 1
Enclosed, 1
engineered, 2
exact, 1
expense, 1
Extreme, 1
F
faults, 1
Features, 1
Filled, 1
filled, 1
flammable, 1
flexibility, 1
follow, 1
For, 1-2
for, 1-2
FR, 1
Functions, 1
H
have, 2
high, 1
I
IEEE, 1
Immediate, 1-2
Improved, 1
in, 1
incoming, 1
Increased, 1
indoor, 1
installation, 1
is, 1
K
KMParts, 1-2
kV, 1
kVA, 1
L
lengths, 1
likelihood, 1
Index
line, 1
Liquid, 1
load, 1
locating, 1
losses, 1
Low, 1-2
low, 1
M
may, 1
mechanical, 1
meet, 1
Meets, 1
Metal, 1
Mineral, 1
Minimized, 1
minimizing, 1
Modern, 1
Most, 1
multiple, 2
MVA, 1
MVS, 1
N
need, 1
NEMA, 1
non, 1
numbers, 2
O
of, 1-2
oil, 1
operators, 1
Optimum, 1
Options, 1
or, 1-2
order, 2
outdoor, 1
P
Page, 1
part, 2
phase, 1
Power, 1-2
power, 1
practicable, 1
pricing, 2
Primary, 1-2
primary, 1-2
Product, 1-2
provides, 1
publication, 1
R
ransformers, 1
ratings, 1
Reduced, 1
Refer, 1-2
referred, 1
regulation, 1
requirements, 1
RESIBLOC, 1
S
safety, 1
Secondary, 1-2
secondary, 1-2
Section, 2
sections, 1
Selection, 2
selection, 1
service, 1
Index
several, 1
Silicon, 1
space, 1
Specification, 2
Specifications, 1-2
Standards, 1-2
standards, 1
substation, 1
Substations, 1-2
substations, 1-2
such, 1
suit, 1
Support, 1-2
Switch, 1
Switchgear, 1-2
switchgear, 1
system, 1
usage, 1
utilization, 1
T
W
TD, 1-2
Tech, 1-2
Technical, 1-2
the, 1-2
This, 1
this, 1
three, 1
through, 1
thus, 1
to, 1-2
Transformer, 1
transformer, 1
Transformers, 1
transformers, 1
Type, 1
type, 1
types, 1
wide, 1
with, 1
www, 1-2
U
UL, 1
Unit, 1-2
unit, 1-2
units, 2
V
vaults, 1
Voltage, 1-2
voltage, 1
voltages, 1
Volume, 1-2
VPE, 1
VPI, 1